Navien NPE-240A Service Manual

Version 2.21
18 NPE Service Manual
4.1 Schematic and Flow Diagram
2-way valve open for Internal Recirculation Mode
2-way valve closed for External Recirculation Mode
[NPE-180A/ 210A /240A]
Primary Heat Exchanger
Secondary Heat Exchanger
Buffer
Tank
Flow
Sensor
Domestic Water
Supply
Hot Water
Supply
Check
Valve
Water
Adjustment
Valve
2-Way
Valve
Open
Circulation
Pump
Internal Recirculation Mode
Primary Heat Exchanger
Secondary Heat Exchanger
Buffer
Tank
Flow
Sensor
Domestic
Water Supply
Hot Water
Supply
Recirculation
Water Supply
Check
Valve
Water
Adjustment
Valve
2-Way
Valve
Closed
Circulation
Pump
External Recirculation Mode
4. System Details

Navien NPE-240A Specifications

General

Type	Tankless
Fuel Type	Natural Gas or Propane
Energy Factor	0.97
Energy Efficiency	97%
Voltage	120V
Ignition Type	Electronic
Maximum Input	199, 900 BTU/h
Water Connection Size	3/4"
Gas Connection Size	3/4"
Warranty	15-year on heat exchangers, 5-year on parts, 1-year on labor
Dimensions	17.3" W x 13.2" D x 27.4" H